I wonder if some of this discussion is about what type of camping you do and where you want to do it. If your going to travel by interstate and never get more then a few miles off it then your prices are going to be more expensive. If you want to stay in a place with a pool, mini golf, and things like that then you have to pay more. It all depends on what you want to do and where you are going.
The person that spends 80000 dollars, or more, on a rig, I'm sure then they have the money and want to stay in a place that has all the amenities and therefore they don't care what it costs.